]a wind turbine blade in the shape of an ellipse is attached to a pedestal at the ellipse’s center. the semi-major axis of the ellipse is required to be 100 meters. when the wind hits the blade the pressure exerted on the blade is given by p(x, y) = k 2 |x| n/m2 (k is a positive constant that depends on the wind speed and air density). to maintain the structural integrity of the turbine and pedestal system, it has been determined that the maximum total force on the blade cannot exceed 108 n. how large can the semi-minor axis of the blade be to prevent destruction of the turbine? (hint: pressure can be thought of as "force density" - note the units)

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

An charge with mass m and charge q is emitted from the origin, (x, y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.

What causes the development of most clouds and precipitation in the atmosphere?